Trial: Popular cholesterol drug fails to improve heart disease

• Story Highlights
• Trial: Vytorin failed to improve heart disease though it reduces key risk factors
  
• Millions of Americans already take the drug or one of its components, Zetia
  
• Yale University cardiologist: People need to return to statins, like Lipitor
  
• Zetia, Vytorin have racked up $5 billion in sales despite limited proof of benefit
  
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